Selective aggregation of single-walled carbon nanotubes via salt addition

被引：107

作者：

Niyogi, Sandip ^{[1
]}

Boukhalfa, Sofiane ^{[1
]}

Chikkannanavar, Satishkumar B. ^{[1
]}

McDonald, Timothy J. ^{[1
]}

Heben, Michael J. ^{[1
]}

Doorn, Stephen K. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Div Chem, C CSE, Los Alamos, NM 87545 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 07期

关键词：

D O I：

10.1021/ja068321j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dispersion of single-walled carbon nanotubes in water with the use of sodium dodecylsulfate allows the study of properties of individual nanotubes. Nanotube isolation is maintained in the dispersions by the electrostatic repulsion between the dodecylsulfate groups adsorbed on the nanotube surface. We present data showing changes in SWNT absorbance and emission spectra in response to titrating the dispersion with salt solutions. The results show an ability to manipulate surface charge density on the SWNTs through changes in surfactant equilibria and charge screening. The diameter dependence of these effects allows diameter-selective aggregation of SWNTs, with some specific cases of chirality-dependent stability being demonstrated.

引用

页码：1898 / +

页数：3